class Factorial { 
	public static void main (String[] a) { 
		System.out.println(new Fac().ComputeFac(10)); 
		} 
} 
class Fac { 
	public int ComputeFac(int num) { 
		int num_aux;
		if (num < 1) num_aux = 1; 
		else num_aux = num * (this.ComputeFac(num-1)); 
		return num_aux;
	} 
}
